Air-compressor governor.



2 SHEBTSSHEET 1.

PATENTBDAUG. 11,1903.

LR. HERRON. AIR COMPRESSOR GOVERNOR.

APPLICATION mum 0013.6. 1902.

H0 MODEL.

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' dff PATENTEDAUG; 11, 1903.

Nomamas.

J. H. HBRRON. AIR COMPRESSOR GOVERNOR.

APPLICATION PILBD 00T. 6, 1902.

2 SHEETS-SHEET 2.

I0 MODEL.

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N TE STATES Patented August 11, 1908.

JAMES H. HERRON, OF ERIE, PENNSYLVANIA, ASSIGNOR TO HERRON 8c BURY MANUFACTURING COMPANY, CORPORATION OF PENNSYLVANIA.

OF ERIE, PENNSYLVANIA, A

AIR-COMPRESSOR GOVERNOR.

SPECIFICATION forming part of LettersPatent No. 736,253, dated August 11, 1903.

Application filed October 6, 1902. Serial No. 126,220. (No model.)

T0 on whom i2; may concern.-

Be it known that I, JAMES H. Hanson, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Air-Compressor Governors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, forming part of this specification.

My invention relates to governors for aircompressors; and it consists in mechanism for controlling the pressure of the output of compressed air so that when'it rises to a predetermined pressure the inlet-valves of the cylinder are automatically raised from their seats, so that the air in the cylinder remains at atmospheric pressure during the operation of the piston until the pressure in the receiver is reduced to the predetermined pressure, when the inlet-valves again return to their seats and become operative, as before.

The features of my invention are hereinafter set forth and described, and illustrated in the accompanying drawings, in which -Figure l is a side View in elevation of an air-compressor cylinder and receiving-tank with the inlet-valve mechanism of the cylinder in section. Fig. 2 is an enlarged vertical section of the governing-valve mechanism of my device on the line 00 0c in Fig. 4. Fig. 3 is another vertical section on the line was in Fig. A with the valve in a raised position without the weight-yoke. Fig. at is a crosssection of the same onthe line y y in Figs. 2 and 3 with the plunger and weight-yoke removed. Fig. 5 is a vertical section of the same on the line a z in Fig. 4 with the valveshell removed. Fig. 6 is a like section on the line w as in Fig. 4.. Fig. 7 is a vertical section of the valve-shell. Fig. 8 is a view in eleva- In the drawings illustrating my invention, A is a compressor-cylinder, B a receivingtank connected by a pipe 0 with the cylin- 5o der-discharge-valve mechanism, 0' the inlet-pipe, and D D the air-inlet valves, all of the usual and ordinary construction.

On the side of the cylinder A, I secure a valve-case E, from the lower part of which a pipe 19 extends to the receiver B, so that the compressed air is supplied thereto at the same pressure as that of the air in the receiver B, and on the lower ends of the valve-casings of the valves D D, I secure plungercylinders D D in line'with the stems of the valves D D, in which cylinders I place plunger-s (l 61, adapted when raised to contact with the lower ends of the stems of the valves D D and raise them off of their seats a a, and from. a passage E (see Figs. 1 and 4:) in the back of the upper part of the valve-case E pipes F F lead down to and into the lower ends of the pluncommunication with the atmosphere by holes 6 The valve-case E has also a middle chamber 6, provided with branches 4 and 5, which overlap the lower and upper chambers, but whichare arranged outof line with them. A- passage E connects the middle chamber constantly with the pipes F.

H is a valve-shell secured in the case E and provided with holes 71', connecting with the lower chamber e, and holes h, arranged between the holes h and connecting with the branch 4 of the middle chamber. The valveshell has holes h connecting with the branch 5 of the middle chamber, and holes 71 between the holes 72 and connecting with the upper chamber. The lower end of the valveshell is constantly open to the lower chamber e.

I is the valve, which is slidable in the valveshell H and which has a head I, which normally rests 011 the top of the valve-shell, and two circumferential grooves '5 and t.

J is a yoke which rests on top of the valve I and which is provided with adjustable weights J for holding down the valve.

When the valve is in its normal position,

.as shown in Fig. 2, the air-pressure in the re- The valve-case E has also ceiver B extends through the pipe I) into the lower chamber 6 and under the valve I. The pipes F at this time are connected with the atmosphere by the passage E, middle chamher 6, hole k valve-groove 5, hole k upper chamber c and hole a The valves D are therefore operative. When the pressure in the receiver B exceeds a prearranged limit, the valve I is forced upward to the position shown in Fig. The air from passage b now passes from the lower chamber e through hole h, valve-groove 11, hole It, branch 4 of middle chamber 6, through said chamber 6', and passage E to the pipes F, and its pressure raises the plungers d, and thereby renders the valves D inoperative until the pressure in the receiver B again becomes normal. When the valve I is raised, the connection between the pair of holes 72. and h is cut off, and when the valve I is down the connection between the pair of holes h and h is cut off.

What I claim is- 1. The combination, with a compressed-air receiver,and plunger-cylinders provided with plungers for raising the valves of an air-compressor; of a governor-valve case, a pipe between the said valve-case and receiver, pipes between the said valve-case and cylinders, a valve-shell secured in the said case and provided with holes arranged in pairs and aloaded governor-valve slidable inside the said Valve-shell and normally connecting the said cylinders with the atmosphere, said valve and its case being'provided with suitable air-passages substantially as set forth which operate normally to connect the said cylinders with the atmosphere, through one pair of holes in the said valve-shell and to connect the said cylinders with the said receiver when the said valve is slid from its normal position by the pressure of the air in the said receiver, through the other pair of holes in the said valve-shell.

2. The combination, with a governor-valve casing provided with a lower chamber and an inlet for compressed air connected with the said chamber, an upper chamber connected with the atmosphere, and a middle chamber having branches which overlap the said lower and upper chambers; of a valve-shell secured in the said case with its lower end open to the said lower chamber, said valve-shell being also provided with holes arranged in pairs for connecting the said lower and upper chambers respectively with the said middle chamber, outlet-pipes connected to the said middle chamber, and a loaded governor-valve slidable in the said valve-shell and provided with grooves for connecting together the pairs of holes in the said valve-shell, substantially as set forth. I

In testimony whereof I affix my signature in presence of two witnesses.

JAMES H. HERRON.

Witnesses H. M. STURGEON, F. J. BASSETT. 

